Effects of Molecular Structure and Packing Order on the Stretchability of Semicrystalline Conjugated Poly(Tetrathienoacene-diketopyrrolopyrrole) Polymers

Lu, Chien; Lee, Wen-Ya; Gu, Xiaodan; Xu, Jie; Chou, Ho-Hsiu; Yan, Hongping; Chiu, Yu-Cheng; He, Mingqian; Matthews, James R.; Niu, Weijun; Tok, Jeffery B. -H.; Toney, Michael F.; Chen, Wen-Chang; Bao, Zhenan

doi:10.1002/aelm.201600311

Title: Effects of Molecular Structure and Packing Order on the Stretchability of Semicrystalline Conjugated Poly(Tetrathienoacene-diketopyrrolopyrrole) Polymers

Journal Article · Fri Dec 23 00:00:00 EST 2016 · Advanced Electronic Materials

DOI:https://doi.org/10.1002/aelm.201600311· OSTI ID:1353111

Lu, Chien ^[1]; Lee, Wen-Ya ^[2]; Gu, Xiaodan ^[3]; Xu, Jie ^[4]; Chou, Ho-Hsiu ^[4]; Yan, Hongping ^[5]; Chiu, Yu-Cheng ^[4]; He, Mingqian ^[6]; Matthews, James R. ^[6]; Niu, Weijun ^[6]; Tok, Jeffery B. -H. ^[4]; Toney, Michael F. ^[5]; Chen, Wen-Chang ^[7]; Bao, Zhenan ^[4]

Stanford Univ., CA (United States). Dept. of Chemical Engineering; National Taiwan Univ., Taipei (Taiwan). Dept. of Chemical Engineering
National Taipei Univ. of Technology, Taipei (Taiwan). Dept. of Chemical Engineering and Biotechnology
Stanford Univ., CA (United States). Dept. of Chemical Engineering; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL); Univ. of Southern Mississippi, Hattiesburg (United States). School of Polymers and High Performance Materials
Stanford Univ., CA (United States). Dept. of Chemical Engineering
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Corning Incorporated, Corning, NY (United States)
National Taiwan Univ., Taipei (Taiwan). Dept. of Chemical Engineering

The design of polymer semiconductors possessing high charge transport performance, coupled with good ductility, remains a challenge. Understanding the distribution and behavior of both crystalline domains and amorphous regions in conjugated polymer films, upon an applied stress, shall provide general guiding principles to design stretchable organic semiconductors. Structure–property relationships (especially in both side chain and backbone engineering) are investigated for a series of poly(tetrathienoacene‐diketopyrrolopyrrole) polymers. It is observed that the fused thiophene diketopyrrolopyrrole‐based polymer, when incorporated with branched side chains and an additional thiophene spacer in the backbone, exhibits improved mechanical endurance and, in addition, does not show crack propagation until 40% strain. Furthermore, this polymer exhibits a hole mobility of 0.1 cm ² V ⁻¹ s ⁻¹ even at 100% strain or after recovered from strain, which reveals prominent continuity and viscoelasticity of the polymer thin film. It is also observed that the molecular packing orientations (either edge‐on or face‐on) significantly affect the mechanical compliance of the polymer films. The improved stretchability of the polymers is attributed to both the presence of soft amorphous regions and the intrinsic packing arrangement of its crystalline domains.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); US Air Force Office of Scientific Research (AFOSR); Ministry of Science and Technology,Taiwan

Grant/Contract Number:: NSC 103-2917-I-002-165; FA9550-15-1-0106; AC02-76SF00515; DE‐AC02‐76SF00515

OSTI ID:: 1353111

Alternate ID(s):: OSTI ID: 1401503

Journal Information:: Advanced Electronic Materials, Vol. 3, Issue 2; ISSN 2199-160X

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 70 works

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